C# - Set Custom Text Field In SelectList?
Feb 13, 2011
I'm trying to display a dropdown on my view page that has a custom text value.
I'm trying to display a list a Contacts. A Contact contains a ContactID, FirstName, and LastName.
<%= Html.DropDownListFor(m => m.ContactId, new SelectList(Model.Contacts, "ContactID", "LastName"), "- Select a Contact -") %>
Right now I'm just displaying the last name, but I'd like to display the first name and last name in the dropdown.
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Aug 20, 2010
why SelectList dont have a default constructor new SelectList()
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Nov 26, 2010
I need to create one custom text box control which should be bind with data base.
I am referring following link...
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.databoundcontrol.aspx
I used DataBoundControl to create my control but i am not able to do it properly.
public class SimpleTextBoxControl : DataBoundControl
{
private TextBox nameTextBox;
public string DataTextField
{
get
{
object o = ViewState["DataTextField"];
return ((o == null) ? string.Empty : (string)o);
}
set
{
ViewState["DataTextField"] = value;
}
}
[
Bindable(true),
Category("Data"),
DefaultValue(""),
Description("The text to display on the link."),
Localizable(true),
PersistenceMode(PersistenceMode.InnerDefaultProperty)
]
public virtual string DataTexValue
{
get
{
string s = (string)ViewState["Text"];
return (s == null) ? String.Empty : s;
}
set
{
ViewState["Text"] = value;
}
}
protected override void PerformDataBinding(IEnumerable retrievedData)
{
if (retrievedData == null)
return;
base.PerformDataBinding(retrievedData);
Controls.Clear();
nameTextBox = new TextBox { ID = "nameTextBox" };
foreach (object dataItem in retrievedData)
{
if (DataTextField.Length > 0)
{
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}
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}
this.Controls.Add(nameTextBox);
}
}
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Mar 25, 2010
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Apr 11, 2014
I have an old database that still contains depreciated Text fields. I need to pull from these fields and display the results. You would think this should be easy... First my select statement caused a problem:
Code:
SELECT DISTINCT ..., CustomerInstructions, ... FROM Orders
where CustomerInstructions is a Text field.
The error I get: "The text data type cannot be selected as DISTINCT because it is not comparable." A quick search shows I can cast the text field as a varchar(max).
Code:
SELECT DISTINCT ..., CAST(CustomerInstructions AS VARCHAR(MAX)), ... FROM Orders
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Sep 14, 2010
I'm failing at getting the selected item on a mvc dropdown list. I can't stand viewdata, and every example uses it. Here is my code,
//controller
public ActionResult Register(Models.Person APerson)
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}
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public Person().............
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Jan 9, 2011
I followed MVC 2 source to create a CheckBoxList helper.
I was able to identify the problem I am having but not able to solve it.
On my view I have the following:
[Code]....
The problem is in the bold part ...
The newSelectList is equal to selectList but all items were deselected.
What am I missing?
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Jun 13, 2010
how can i disable first value in the select list when the checkbox is clicked
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Dec 24, 2010
i have wrote the following code inside a model class, but there was an error that indicates that the select list could not be found:-
public SelectList Countries {
get;
private
set; }
so which "using system" i should add????
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Jan 2, 2011
I'm working on a MVC3 web application. I want a list of categories shown when editing a blo from whe applications managements system. In my viewmodel i've got the following property defined for a list of selectlistitems for categories.
/// <summary>
/// The List of categories
/// </summary>
[Display(Name = "Categorie")]
public IEnumerable<SelectListItem> Categories { get; set; }
The next step, my controller contains the following edit action where the list of selectlistitems is filled from the database.
public ActionResult Edit(Guid id)
{
var blogToEdit = _blogService.First(x => x.Id.Equals(id));
var listOfCategories = _categorieService.GetAll();
var selectList = listOfCategories.Select(x =>new SelectListItem{Text = x.Name, Value = x.Id.ToString(), Selected = x.Id.Equals(blogToEdit.Category.Id)}).ToList();
selectList.Insert(0, new SelectListItem{Text = Messages.SelectAnItem, Value = Messages.SelectAnItem});
var viewModel = new BlogModel
{
BlogId = blogToEdit.Id,
Active = blogToEdit.Actief,
Content = blogToEdit.Text,
Title = blogToEdit.Titel,
Categories = selectList //at this point i see the expected item being selected
//Categories = new IEnumerable<SelectListItem>(listOfCategories, "Id", "Naam", blogToEdit.CategorieId)
};
return View(viewModel);
}
When i set a breakpoint just before the view is being returned, i see that the selectlist is filled as i expected. So at this point everything seems to be okay. The viewmodel is filled entirely correct.
Then in my view (i'm using Razor) i've got the following two rules which are supposed to render the selectlist for me.
@Html.LabelFor(m => m.Categories) @Html.DropDownListFor(model=>model.Categories, Model.Categories, Model.CategoryId)
@Html.ValidationMessageFor(m => m.Categories)
When I run the code and open the view to edit my blog, I can see all the correct data. Also the selectlist is rendered correctly, but the item i want to be selected lost it's selection. How can this be? Until the point the viewmodel is being returned with the view everything is okay. But when i view the webpage in the browser, the selectlist is there only with out the correct selection. What am I missing here? Or doing wrong?
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Jan 14, 2011
Is there a way to remove items from a SelectList?
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Nov 18, 2010
I cannot get my code to work with the usual workarounds. I have a model which exposes a SelectList and a value for the selected item in it. The list is built like: new SelectList(persons, "Id", "Name");
where persons is an array of type Person with a *string* property named Id and a string property named Name. My model has a SelectList property returning a list built as shown, and a SelectedPersonId *string* property which should be updated by the dropdown. Here's my view code:
Html.DropDownListFor(m => m.SelectedPersonId, Model.PersonList)
I can see the persons in the dropdown and select one item, but the model's SelectedPersonId property never gets updated (I get a null). Of the two workarounds I found googling around, one stated to build the SelectList in the model, using the constructor shown above; another recommended to ensure that the selected value is a string. I did both, but still it does not work.
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Feb 25, 2011
I had been building my SelectLists in the View, but I found examples doing it in code that I liked better. Now I'm creating one of my SelectLists like this:
[Code]....
And all is good, but I'm not sure how to do two things. First, I'd like to add an initial SelectListItem that prompts the user to select a value. When instantiating the SelectList in a loop this is easy, but I was hoping to keep this approach. The second problem is setting the default selected item. In the constructor it shows the 4th parameter to be used for this purpose, but I'm not certain how to do it. There's a property of this object named "DefaultView". It's a boolean, and I'd like that to determine the selected state. Is this possible?
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Dec 20, 2010
created a Custom Textbox Control that is intended to be a "masked date" textbox, so that I can handle different ways a user might enter in a date and make it work no matter what.I did this by creating a custom control with 3 separate Textboxes one for month,one for day one for year,then do some handling for different things that could be entered and it would all work.
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has entered a date?first custom control I have created and have been using google.
My Server Control Code is as follows:
[Code]...
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Jul 1, 2010
I have written an Enum extension method that allows me to create a view model and allows me to easily bind a generic Enum to a SelctList like:this.ProductStatusList = new ProductStatusTypes().BindToSelectList<ProductStatusTypes>
(product.Status.ToString());
In my View I can then have:
<% using (Html.BeginForm()) {%>
<fieldset> [code]...
Notice I am using EditorForModel and then a seperate DropDownList. My question is: Is there a way to get the EditorForModel to be clever enough to pick up that I want to use a SelectList instead of a TextBox for status?
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Jan 5, 2011
I'm having problems retrieving the values of a selectlist in my form collection. I've tried making a viewmodel with an attribute with the same name as the select list.
I'm honestly just realizing I REALLY don't understand how model binding works with selectlists. I've just been assuming that the following conventions apply:
Name the select list the same thing as the attribute on the model you want it to bind to. Apart from that, I really don't get it. I've looked at several books on it and they're useless frankly. How does a select list work with a) form collection and b) a particular model?
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Jan 14, 2010
What do I use to set the dataValueField of the Select List when I'm using a list of strings. I want to be able to set the value of the option in the select. If i have:
List<string> list = new List<string>();
list.Add("apple");
list.Add("orange");
and I want my html to be:
<select>
<option value="apple">apple</option>
<option value="orange">orange</option>
</select>
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Mar 23, 2011
I can currently populate and display a Drop Down using the following model annotations, viewmodel, and custom Editor template - but am having problems persisting the submission (more on that below):
//Domain
Public class Person
{
public string FirstName {get;set;}
public string LastName {get;set;}
public string ClassName {get;set;}
public int ClassId {get;set;}
...
}
//ViewModel
Public class PersonViewModel
{
public Person Person {get;set;}
Like I mentioned, the above works fine - as in the drop down is displayed properly, but obviously in its current state it's not saving the classID (or name) to the Person entity, I understand the problem but not sure how to fix it.
My questions:
How can I save the selected value from the drop down to the Person entity
How can I save both the ID and the Name into the Person entity - I'm guessing only way is a hidden field that gets populated with an onchange event (this sounds weird, I'm sure, but it's being stored in a document DB, so it's not normalized - I may just store Name in the end)
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Mar 18, 2010
How to add required field support to custom web control? I can't see any doc on that?
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Apr 23, 2010
n my Asp.net / C# page I have 1 drop down and 1 date field. Dropdown contains 2 items "Item1", "Item2" and "Item3" I want to implement following logicBy Default datefield will not visible Once user select "Item2" thne this field will be visibile and this field should be required and check for entered date should not be less than toays date. If select "Item1" or "Item3" thne this field should not be visible and there should be no validation on date field.
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Jan 15, 2010
Here is a code for my web form control
<asp:TextBox runat="server" ID="txtUsername"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="txtUsername" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>
<asp:CustomValidator OnServerValidate="checkUsername" ID="CustomValidator1" runat="server" ControlToValidate="txtUsername" EnableClientScript="true" ClientValidationFunction="checkUsername" ErrorMessage="CustomValidator"></asp:CustomValidator>
Client side validation
<script type="text/javascript">
function checkUsername(source,args){
alert("test");
/* alert(args.Value);
[Code]....
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Jan 12, 2010
How can validate Password field using Custom validater control in asp.net 2.0 ?
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Sep 6, 2010
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i don't have code to show becouse i am trying to figure out how to do this and not showing a problem...
Background: I have an aspx file that holds a keyboard div and a hidden TextArea or an Input type=hidden (not decided yet). This page is a user control so it cen be used in all the pages that needs it...
What i am tring to do: Using JQuery bind('focus',...) method to bind any field in a certian aspx page (not the keyboard UC itself) to the hidden text field, i want that every thing i click on the keyboard will show in the text field that is on focus....
Can i relate in JS/JQuery to a field that is in a different page, will it recognise it? how can i do the bind, how can i transfer text from one field to another? if there a better way to do this, i will be happy to hear about it...
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